First time recording myself on a quick sketch, so hope this works. No sound, so play something in the background before you get bored.
I downloaded the Photoshop CS6 beta and tried it out. 90% of the time I only use PS for painting, so I tried out the new brushes, and while I can’t say that custom brushes are not necessary, it is coming close to that. I mainly stuck with the hard round brush and a textured paint brush. I can positively say it’s leagues away from CS5 in terms of digital painting.
My one grip was with the pencil-textured brushes. Some of them weren’t as responsive or useful as I would hope, but that’s fine, there’s plenty of those on the web to grab.